The present invention relates to a distribution pump arrangement for a bi-directional hydraulic distribution grid (10). The distribution pump arrangement comprising: a hot conduit control valve (20) in a hot conduit (12); a first distribution pump (22) having an inlet (22a) connected to the hot conduit (12) at a first side (20a) of the hot conduit control valve, and an outlet (22b) connected to the hot conduit (12) at a second side (20b), opposite the first side (20a), of the hot conduit control valve (20); a pressure difference determining device (80, 80′) arranged beyond the second side of the hot conduit control valve (20) and configured to determine a local pressure difference, Δp, between a local pressure, p.sub.hot, of heat transfer liquid in the hot conduit (12) and a local pressure, p.sub.cold, of heat transfer liquid in the cold conduit (14); and a controller (90) configured to: while Δp<a threshold value, set the distribution pump arrangement in a flowing mode, wherein: the first distribution pump (22) is set to be inactive, and the hot conduit control valve (20) is set to be open, while Δp≥the threshold value and p.sub.cold>p.sub.hot, set the distribution pump arrangement in a hot conduit pumping mode, wherein: the hot conduit control valve (20) is set to be closed, and the first distribution pump (22) is set to be active, thereby reduce the local pressure difference.

To compensate for an event, equipment may require a power down sequence of a motor connected to a pump to prevent the pumping of servicing fluid at a high pressure, high pressure fluid may be required to be diverted to a reservoir or otherwise diverted from a wellhead, multiple pumping systems may require that pumping pressure be altered or adjusted or that flow rate be altered or adjust to manage or control the conditions to protect equipment or personnel at a site. Activating, adjusting or altering an operational characteristic of equipment by using a control system may automatically initiate the most efficient and effective mitigation steps for equipment at a site when condition is detected or predicted. Collecting and analyzing information from devices, components, sensors, control systems, other equipment or any combination thereof at a site by a master control system provides automated control of pressure sensitive conditions.

An autonomous marking apparatus comprising a propulsion system, a location sensor, a payload assembly, one or more marking sensors, a transceiver, a data store, and a processor. The location sensor is arranged to determine the location of the apparatus. The payload assembly is arranged to carry a payload of marking material. The one or more marking sensors are arranged to scan an area in proximity to the apparatus. The transceiver is arranged to exchange data with a remote server via a data network. The data store is arranged to store a portion of the data. The processor is arranged to receive data from the location sensor, the one or more marking sensors, and from the transceiver. The processor is also arranged to send data to the transceiver and control the delivery of the payload at the location of the apparatus.

An apparatus and method controls an environmental control system to maintain a differential pressure between a room and one or more adjacent areas by (1) determining a differential pressure error based on the differential pressure and a differential pressure set point using a proportional-integral-derivative (PID) controller; (2) increasing an air change per hour set point whenever one or more first parameters are satisfied; (3) decreasing the air change per hour set point whenever one or more second parameters are satisfied; and (4) sending one or more control signals to the environmental control system that maintain the differential pressure between the room and the one or more adjacent areas by adjusting: (a) the leading airflow to be approximately equal to the air flow change set point multiplied by a volume of the room divided by 60, and (b) the tracking airflow to maintain a volume differential set point.

A control system (15) controls a water supply from at least two separate input lines (3i-k) into a sector (1) of a water supply network. The control system (15) is configured to receive input flow information indicative of the water input flow (q.sub.i-k) through each of the input lines (3i-k). The control system (15) is configured to receive input pressure information indicative of the input pressure (p.sub.i) in at least one (3i) of the input lines (3i-k). The control system (15) is configured to receive pressure information indicative of at least one pressure value (p.sub.cri,m,n) determined by a pressure sensor (7m,n) within the sector (1). The control system (15) is configured to control the input pressure (p.sub.i) by controlling at least a pressure regulating system (13i) at an input line (3i) based on the input flow information from all input lines (3i-k) and based on the sector pressure information.

A marking identification system comprising a marking database, a drone, and a data network communicatively coupled to the marking database and drone. The marking database is arranged to store marking data associated with one or more markings. The marking data can include one or more marking locations within a geographic area and a type of infrastructure associated with each of the one or more marking. The drone is arranged to determine the location of the drone via one or more location sensors, receive data from the marking database, and deploy to the location within the geographic area. The drone is also arranged to detect one or more markings within the geographic area, detect an indicator in pain associated with each of the detected markings, and determine a type of infrastructure associated with each of the detected markings based on the detected indicator associated with each of the markings.

A marking maintenance system comprising a marking database, a drone, and a data network communicatively coupled to the marking database and drone. The marking database is arranged to store marking data associated with one or more markings. The marking data can include one or more marking locations within a geographic area and a type of infrastructure associated with each of the one or more marking. The drone is arranged to determine the location of the drone via one or more location sensors, receive data from the marking database, and deploy to each marking location within a portion of the geographic area. The drone is also arranged to determine whether each marking within the portion of the geographic area is sufficiently present using one or more marker sensors and repair each marking within the portion of the geographic area that is determined to not be sufficiently present.

The present invention relates to a distribution pump arrangement for a bi-directional hydraulic distribution grid (10). The distribution pump arrangement comprising: a hot conduit control valve (20) in a hot conduit (12); a first distribution pump (22) having an inlet (22a) connected to the hot conduit (12) at a first side (20a) of the hot conduit control valve, and an outlet (22b) connected to the hot conduit (12) at a second side (20b), opposite the first side (20a), of the hot conduit control valve (20); a pressure difference determining device (80, 80′) arranged beyond the second side of the hot conduit control valve (20) and configured to determine a local pressure difference, Δp, between a local pressure, p.sub.hot, of heat transfer liquid in the hot conduit (12) and a local pressure, p.sub.cold, of heat transfer liquid in the cold conduit (14); and a controller (90) configured to: while Δp<a threshold value, set the distribution pump arrangement in a flowing mode, wherein: the first distribution pump (22) is set to be inactive, and the hot conduit control valve (20) is set to be open, while Δp≥the threshold value and p.sub.cold>p.sub.hot, set the distribution pump arrangement in a hot conduit pumping mode, wherein: the hot conduit control valve (20) is set to be closed, and the first distribution pump (22) is set to be active, thereby reduce the local pressure difference.

A high integrity protection system includes a flow line including an inlet configured to be connected to a first source of pressure and an outlet configured to be connected to a downstream system. A first subsystem is installed on the flow line between the inlet and the outlet. A second subsystem is installed on the flow line between the inlet and the outlet, and the second subsystem is in a parallel flow configuration in relation to the first subsystem. The system includes a second source of pressure configured to be fluidically connected to the first subsystem and the second subsystem.

The invention relates to a pressurization unit for use in processing equipment handling high pressure fluid, where the pressurization unit comprises at least one inlet and an outlet, the pressurization unit being adapted to receive a feed fluid at a feed pressure level at the inlet, being adapted to isolate the received feed fluid from the inlet and from the outlet and being adapted to increase the pressure of the fluid to a higher predetermined level and further being adapted to output the fluid through the outlet into the high pressure process while still isolated towards the inlet.